Abstract: Land space planning and management are of significant importance to urban sustainable development. Taking Zhangzhou City, Fujian Province, as the research object, this paper utilizes GIS (Geographic Information System) technology to assist in translating the current status of territorial spatial planning, establishing a 'dual evaluation' system, delineating urban development boundaries, and establishing information management platforms. The paper discusses the methods of land space planning and management and their effectiveness in practical applications. Through the collection, processing, and analysis of land spatial data, it provides a scientific basis for the rational utilization and planning of land resources.